Through the program, she went on 14 medical missions to various nations, including Ethiopia, Honduras, India, Malawi, the Philippines, Rwanda and Thailand.

"The world and our community has lost a beautiful soul," Camp Hill resident Donnamarie Freedman wrote on Facebook. "May she rest in peace and prayers for her family."

On Wednesday afternoon, Robin Jones was still looking for the right words to share with Davidson's husband, daughter and son.

"I'm just in shock," Jones said through tears. "I just keep thinking of her laugh. She was a ray of sunshine."

Jones, the executive director of The Lion Foundation in Camp Hill, knew Davidson for 20 years and was one of the first people she met upon moving to the Country Club Hills from Washington, D.C.

"She's been a mentor for how to be a friend and neighbor and good person," Jones said.

Jones remembers her friend as "a wonderful mother, a talented cook, the most generous and giving person."

"She could make everyone laugh," Jones said.

Davidson's talents in the kitchen were unmatched, she said.

"She made gourmet catered meals for her son's soccer team," Jones said. "Anything she did, she put her heart into it."

That was especially true for her work with Health Volunteers Overseas.

"She was so proud to organize mission trips and help people in other countries," Jones said. "She was such a wonderful person. This is an unbelievable tragedy and loss."

It's also a tragedy without many answers.

Some friends speculated Davidson was walking on the shoulder to avoid ice on the sidewalk. Others have wondered how the vehicle driven by a 33-year-old York County man swerved onto the shoulder of 11/15 and struck her.

Police say they're still trying to answer those questions about how the crash occurred.

"We're still in the preliminary stages of the investigation," said Camp Hill Police Officer Todd Harrar. "We're still in the very early stages of investigating."